Irrigation unit



FIG. 1 is a front view of the irrigation unit;

FIG. 2 is a right side lateral view of the irrigation unit;

FIG. 3 is a rear view of the irrigation unit;

FIG. 4 is a left side lateral view of the irrigation unit;

FIG. 5 is a top view of the irrigation unit;

FIG. 6 is a bottom plan view of the irrigation unit; and,

FIG. 7 is a perspective view of the irrigation unit. 

The ornamental design of for an irrigation unit, as shown and described. 